This is a modified take on user kevn's Portable Chainsaws for Nekros build.

Pumping up Slash damage, status chance and critical chance.
Build centered around [Amalgam Ripkas True Steel] for its 100% Gore (dismemberment chance which only happens if Slash is doing >50% of the damage) to create more "dead things" on the ground for [Nekros] to use Desecrate on.
Bodies on the ground can be hit and dismembered up to 2 times (we want to bisect torsos so Desecrate has double the drops per kill).
Best part about this is that if for some reason you don't like using the [Ripkas], you don't have to! The 100% Gore is applied to not just the [Ripkas] but your other weapons, your abilities, companion, summons, etc.

The Melee Duplicate arcane is there of you have it. It'll double your crit hits. Which for our purposes might be a little gratuitous.

Slap this build on to your preferred [Nekros] or [Nekros Prime] build and go farming